linux-kernel - Re: [PATCH v21 03/13] clocksource: arm_arch_timer: remove arch_timer_detect

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Date:   Mon, 20 Mar 2017 14:59:35 +0800
From:   Fu Wei <fu.wei@...aro.org>
To:     Mark Rutland <mark.rutland@....com>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        rruigrok@...eaurora.org, "Abdulhamid, Harb" <harba@...eaurora.org>,
        Christopher Covington <cov@...eaurora.org>,
        Timur Tabi <timur@...eaurora.org>,
        G Gregory <graeme.gregory@...aro.org>,
        Al Stone <al.stone@...aro.org>, Jon Masters <jcm@...hat.com>,
        Wei Huang <wei@...hat.com>, Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
        Leo Duran <leo.duran@....com>,
        Wim Van Sebroeck <wim@...ana.be>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-watchdog@...r.kernel.org, Tomasz Nowicki <tn@...ihalf.com>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Julien Grall <julien.grall@....com>
Subject: Re: [PATCH v21 03/13] clocksource: arm_arch_timer: remove arch_timer_detect_rate

Hi Mark,

On 18 March 2017 at 02:07, Mark Rutland <mark.rutland@....com> wrote:
> On Tue, Feb 07, 2017 at 02:50:05AM +0800, fu.wei@...aro.org wrote:
>> From: Fu Wei <fu.wei@...aro.org>
>>
>> The original counter frequency detection call(arch_timer_detect_rate)
>> include getting the frequency from the per-cpu arch-timer and the
>> memory-mapped (MMIO) timer interfaces. But they will be needed only when
>> the system initializes the relevant timer.
>>
>> This patch remove arch_timer_detect_rate founction, and use the
>> arch_timer_get_sysreg_freq and arch_timer_get_mmio_freq directly.
>>
>> Signed-off-by: Fu Wei <fu.wei@...aro.org>
>
> Could you please fold this with the prior patch?

Sure, will do

>
>> @@ -1087,7 +1072,12 @@ static int __init arch_timer_mem_init(struct device_node *np)
>>        */
>>       if (!arch_timer_rate &&
>>           of_property_read_u32(np, "clock-frequency", &arch_timer_rate))
>> -             arch_timer_detect_rate(base);
>> +             arch_timer_rate = arch_timer_get_mmio_freq(base);
>> +     if (!arch_timer_rate) {
>> +             pr_err(FW_BUG "frequency not available for MMIO timer.\n");
>
> It would be better to say "MMIO frequency not available.\n" here.

thanks , will do

>
> Thanks,
> Mark.



-- 
Best regards,

Fu Wei
Software Engineer
Red Hat